BC Realty Group
  • Search
    • Sales
    • Rentals
    • Commercial
    • Open Houses
  • New Listings
    • Sales
    • Rentals
  • Agents
  • About
    • BC Realty Group
    • Mission Statement
  • Resources
    • Market Reports
    • Renting 101
    • Buying 101
    • Selling 101
  • Join Team
  • Contact
    • Currency
    • Login
    • Register
    • Currency
    • Login
    • Register
  • 25 East 21st Street, DUPLEX23
  • 16 Rooms
  • 7 Beds
  • 8.5 Baths
  • $ 8,800,000
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010

25 East 21st Street, DUPLEX23

Flatiron District   |   Broadway & Park Avenue South

Condo [Concierge]
$ 8,800,000
Rooms 16
Bedrooms 7
Bathrooms 8.5
Status Active
Real Estate Taxes [Monthly] $ 5,758
Common Charges [Monthly] $ 7,362
ASF/ASM 7,000/650
Financing Allowed 90%
Listing ID: 2052159

Photos

25 East 21st Street DUPLEX23 Flatiron District New York NY 10010
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010

Anny Yau

License

Real Estate Broker


W: 347-921-2111

Floor Plans

25 East 21st Street DUPLEX23 Flatiron District New York NY 10010
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010

Anny Yau

License

Real Estate Broker


W: 347-921-2111
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010

Property Description

The combination of the 2nd and 3rd floors to create a sprawling 7,000 sq. ft. duplex—one of the largest Flatiron condo lofts available. Each floor boasts an expansive open layout measuring over 40 feet wide and 82 feet deep, with soaring ceilings ranging from 12.5 to 13.5 feet. This extraordinary space offers the opportunity to design a duplex of epic proportions. Imagine crafting a spacious 7-bedroom home with 7-8 bathrooms, generous entertaining areas, a media room, library, home office, gym, spa, ample storage, staff rooms, and more. The south-facing, oversized windows flood the space with brilliant natural light throughout the day. The current floor plans (both floors feature identical layouts) showcase a versatile blank canvas, and a proposed 7-bedroom configuration is also available for inspiration. With only two small columns on each floor, the possibilities for customization are virtually limitless. This exclusive boutique condo building comprises just 11 full-floor residences and features a doorman for added convenience. The seamless conversion from commercial to residential use provides the freedom to develop your vision. Nestled on a peaceful, picturesque block in the heart of Flatiron, this offering is a rare gem—a unique opportunity to craft an exceptional living space tailored to your style and imagination.
The combination of the 2nd and 3rd floors to create a sprawling 7,000 sq. ft. duplex—one of the largest Flatiron condo lofts available. Each floor boasts an expansive open layout measuring over 40 feet wide and 82 feet deep, with soaring ceilings ranging from 12.5 to 13.5 feet. This extraordinary space offers the opportunity to design a duplex of epic proportions. Imagine crafting a spacious 7-bedroom home with 7-8 bathrooms, generous entertaining areas, a media room, library, home office, gym, spa, ample storage, staff rooms, and more. The south-facing, oversized windows flood the space with brilliant natural light throughout the day. The current floor plans (both floors feature identical layouts) showcase a versatile blank canvas, and a proposed 7-bedroom configuration is also available for inspiration. With only two small columns on each floor, the possibilities for customization are virtually limitless. This exclusive boutique condo building comprises just 11 full-floor residences and features a doorman for added convenience. The seamless conversion from commercial to residential use provides the freedom to develop your vision. Nestled on a peaceful, picturesque block in the heart of Flatiron, this offering is a rare gem—a unique opportunity to craft an exceptional living space tailored to your style and imagination.

Listing Courtesy of Compass

Anny Yau

License

Real Estate Broker


W: 347-921-2111

Care to take a look at this property?

Apartment Features

A/C [Central]

View / Exposure

North, South Exposures
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010
25 East 21st Street DUPLEX23 Flatiron District New York NY 10010

Building Details [25 East 21st Street]

Ownership Condo
Service Level Concierge
Access Elevator
Pet Policy Pets Allowed
Block/Lot 850/7501
Building Type Loft
Age Pre-War
Year Built 1904
Floors/Apts 11/11

Building Amenities

New Development

Mortgage Calculator in [US Dollars]

$
%
$
%

Loan Amount

Anny Yau

License

Real Estate Broker


W: 347-921-2111
This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2025 REBNY Listing Service, Inc. All rights reserved. Additional building data provided by On-Line Residential [OLR].
All information furnished regarding property for sale, rental or financing is from sources deemed reliable, but no warranty or representation is made as to the accuracy thereof and same is submitted subject to errors, omissions, change of price, rental or other conditions, prior sale, lease or financing or withdrawal without notice. All dimensions are approximate. For exact dimensions, you must hire your own architect or engineer.
Built With OLR
Search
New Listings
Agents
About
Resources
Join Our Team
Contact Us
© 2025 by BC Realty Group.  All Rights Reserved 39 27-29 Street 3rd Floor, Long Island City, NY 11101
347-921-2111 | ayau@bcrealtygroup.com
Fair Housing
Broker's Operating Procedures
Built With OLR T01.50.0.0 | Core: 50.0.0
39 27-29 Street 3rd Floor, Long Island City, NY 11101
T:   347-921-2111   |   Email:   ayau@bcrealtygroup.com
T01.50.0.0 | Core: 50.0.0